Related papers: Target Selection and Validation of DESI Quasars

Detecting Massive Galaxies at High Redshift using the Dark Energy Survey

The Dark Energy Survey (DES) will be unprecedented in its ability to probe exceptionally large cosmic volumes to relatively faint optical limits. Primarily designed for the study of comparatively low redshift (z<2) galaxies with the aim of…

Cosmology and Nongalactic Astrophysics · Physics 2013-07-05 L. J. M. Davies , C. Maraston , D. Thomas , D. Capozzi , R. H. Wechsler , M. T. Busha , M. Banerji , F. Ostrovski , C. Papovich , B. X. Santiago , R. Nichol , M. A. G. Maia , L. N. da Costa

The VST ATLAS Quasar Survey I: Catalogue

We present the VST ATLAS Quasar Survey, consisting of $\sim1,229,000$ quasar (QSO) candidates with $16<g<22.5$ over $\sim4700$ deg$^2$. The catalogue is based on VST ATLAS$+$NEOWISE imaging surveys and aims to reach a QSO sky density of…

Astrophysics of Galaxies · Physics 2023-05-17 Alice Eltvedt , T. Shanks , N. Metcalfe , B. Ansarinejad , L. F. Barrientos , R. Sharp , U. Malik , D. N. A. Murphy , M. Irwin , M. Wilson , D. M. Alexander , A. Kovacs , J. Garcia-Bellido , S. Ahlen , D. Brooks , A. de la Macorra , A. Font-Ribera , S. Gontcho a Gontcho , K. Honscheid , A. Meisner , R. Miquel , J. Nie , G. Tarlé , M. Vargas-Magaña , Z. Zhou

DES J0454-4448: Discovery of the First Luminous z > 6 Quasar from the Dark Energy Survey

We present the first results of a survey for high redshift, z $\ge$ 6, quasars using izY multi-colour photometric observations from the Dark Energy Survey (DES). Here we report the discovery and spectroscopic confirmation of the $\rm…

Astrophysics of Galaxies · Physics 2015-12-07 S. L. Reed , R. G. McMahon , M. Banerji , G. D. Becker , E. Gonzalez-Solares , P. Martini , F. Ostrovski , M. Rauch , T. Abbott , F. B. Abdalla , S. Allam , A. Benoit-Levy , E. Bertin , E. Buckley-Geer , D. Burke , A. Carnero Rosell , L. N. da Costa , C. ĎAndrea , D. L. DePoy , S. Desai , H. T. Diehl , P. Doel , C. E Cunha , J. Estrada , A. E. Evrard , A. Fausti Neto , D. A. Finley , P. Fosalba , J. Frieman , D. Gruen , K. Honscheid , D. James , S. Kent , K. Kuehn , N. Kuropatkin , O. Lahav , M. A. G. Maia , M. Makler , J. Marshall , K. Merritt , R. Miquel , J. Mohr , B. Nord , R. Ogando , A. Plazas , K. Romer , A. Roodman , E. Rykoff , M. Sako , E. Sanchez , B. Santiago , M. Schubnell , I. Sevilla , C. Smith , M. Soares-Santos , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , D. Tucker , A. Walker , R. H. Wechsler

Characterizing the WISE-selected Heavily Obscured Quasar Population with Optical Spectroscopy from the Southern African Large Telescope

We present the results of an optical spectroscopic survey of 46 heavily obscured quasar candidates. Objects are selected using their mid-infrared (mid-IR) colours and magnitudes from the Wide-Field Infrared Survey Explorer (WISE) and their…

Astrophysics of Galaxies · Physics 2017-12-27 R. E. Hviding , R. C. Hickox , K. N. Hainline , C. M. Carroll , M. A. DiPompeo , W. Yan , M. L. Jones

Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release Six

We present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data of the Sloan Digital Sky Survey (SDSS). The objects are all point sources to a limiting magnitude of i=21.3 from 8417 sq. deg. of imaging from…

Astrophysics · Physics 2014-11-18 Gordon T. Richards , Adam D. Myers , Alexander G. Gray , Ryan N. Riegel , Robert C. Nichol , Robert J. Brunner , Alexander S. Szalay , Donald P. Schneider , Scott F. Anderson

Three new VHS-DES Quasars at 6.7 < z < 6.9 and Emission Line Properties at z > 6.5

We report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 dataset combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly…

Astrophysics of Galaxies · Physics 2019-06-19 S. L. Reed , M. Banerji , G. D. Becker , P. C. Hewett , P. Martini , R. G. McMahon , E. Pons , M. Rauch , T. M. C. Abbott , S. Allam , J. Annis , S. Avila , E. Bertin , D. Brooks , E. Buckley-Geer , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , C. E. Cunha , C. B. D'Andrea , L. N. da Costa , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , A. E. Evrard , B. Flaugher , J. Frieman , J. Garcia-Bellido , E. Gaztanaga , D. Gruen , J. Gschwend , G. Gutierrez , D. L. Hollowood , K. Honscheid , B. Hoyle , D. J. James , K. Kuehn , O. Lahav , M. Lima , M. A. G. Maia , J. L. Marshall , R. Miquel , R. L. C. Ogando , A. A. Plazas , A. Roodman , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , M. Smith , R. C. Smith , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , D. L. Tucker , V. Vikram

Detecting and Characterizing Mg II absorption in DESI Survey Validation Quasar Spectra

We present findings of the detection of Magnesium II (Mg II, {\lambda} = 2796, 2803 {\AA}) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI). DESI is projected to obtain spectroscopy of approximately 3…

Astrophysics of Galaxies · Physics 2023-09-01 Lucas Napolitano , Agnesh Pandey , Adam D. Myers , Ting-Wen Lan , Abhijeet Anand , Jessica Aguilar , Steven Ahlen , David M. Alexander , David Brooks , Rebecca Canning , Chiara Circosta , Axel De La Macorra , Peter Doel , Sarah Eftekharzadeh , Victoria A. Fawcett , Andreu Font-Ribera , Juan Garcia-Bellido , Satya Gontcho A Gontcho , L. Le Guillou , Julien Guy , Klaus Honscheid , Stephanie Juneau , T. Kisner , Martin Landriau , Aaron M. Meisner , Ramon Miquel , J. Moustakas , Will J. Percival , J. Xavier Prochaska , Michael Schubnell , Gregory Tarle , B. A. Weaver , Benjamin Weiner , Zhimin Zhou , Hu Zou , Siwei Zou

The Construction of Large-scale Structure Catalogs for the Dark Energy Spectroscopic Instrument

We present the technical details on how large-scale structure (LSS) catalogs are constructed from redshifts measured from spectra observed by the Dark Energy Spectroscopic Instrument (DESI). The LSS catalogs provide the information needed…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-19 A. J. Ross , J. Aguilar , S. Ahlen , S. Alam , A. Anand , S. Bailey , D. Bianchi , S. Brieden , D. Brooks , E. Burtin , A. Carnero Rosell , E. Chaussidon , T. Claybaugh , S. Cole , K. Dawson , A. de la Macorra , A. de Mattia , Arjun Dey , Biprateep Dey , P. Doel , K. Fanning , S. Ferraro , J. Ereza , A. Font-Ribera , J. E. Forero-Romero , E. Gaztañaga , H. Gil-Marín , S. Gontcho A Gontcho , A. X. Gonzalez-Morales , J. Guy , C. Hahn , S. Heydenreich , K. Honscheid , C. Howlett , M. Ishak , T. Karim , D. Kirkby , T. Kisner , H. Kong , A. Kremin , A. Krolewski , A. Lambert , M. Landriau , J. Lasker , L. Le Guillou , M. E. Levi , M. Manera , P. Martini , P. McDonald , A. Meisner , R. Miquel , J. Moon , J. Moustakas , A. Muñoz-Gutiérrez , A. D. Myers , S. Nadathur , L. Napolitano , J. A. Newman , J. Nie , G. Niz , N. Palanque-Delabrouille , W. J. Percival , C. Poppett , F. Prada , A. Raichoor , C. Ravoux , M. Rezaie , A. Rosado-Marin , G. Rossi , L. Samushia , E. Sanchez , E. F. Schlafly , D. Schlegel , H. Seo , A. Smith , D. Sprayberry , G. Tarlé , D. Valcin , M. Vargas-Magaña , B. A. Weaver , M. Wilson , J. Yu , P. Zarrouk , C. Zhao , R. Zhou , H. Zou

Quasar Classification Using Color and Variability

We conduct a pilot investigation to determine the optimal combination of color and variability information to identify quasars in current and future multi-epoch optical surveys. We use a Bayesian quasar selection algorithm (Richards et al.…

Astrophysics of Galaxies · Physics 2016-08-08 Christina M. Peters , Gordon T. Richards , Adam D. Myers , Michael A. Strauss , Kasper B. Schmidt , Željko Ivezić , Nicholas P. Ross , Chelsea L. MacLeod , Ryan Riegel

Characterising the target selection pipeline for the Dark Energy Spectroscopic Instrument Bright Galaxy Survey

We present the steps taken to produce a reliable and complete input galaxy catalogue for the Dark Energy Spectroscopic Instrument (DESI) Bright Galaxy Survey (BGS) using the photometric Legacy Survey DR8 DECam. We analyse some of the main…

Astrophysics of Galaxies · Physics 2021-05-24 Omar Ruiz-Macias , Pauline Zarrouk , Shaun Cole , Carlton M. Baugh , Peder Norberg , John Lucey , Arjun Dey , Daniel J. Eisenstein , Peter Doel , Enrique Gaztañaga , ChangHoon Hahn , Robert Kehoe , Ellie Kitanidis , Martin Landriau , Dustin Lang , John Moustakas , Adam D. Myers , Francisco Prada , Michael Schubnell , David H. Weinberg , M. J. Wilson

The Early Data Release of the Dark Energy Spectroscopic Instrument

The Dark Energy Spectroscopic Instrument (DESI) completed its five-month Survey Validation in May 2021. Spectra of stellar and extragalactic targets from Survey Validation constitute the first major data sample from the DESI survey. This…

Cosmology and Nongalactic Astrophysics · Physics 2024-10-18 DESI Collaboration , A. G. Adame , J. Aguilar , S. Ahlen , S. Alam , G. Aldering , D. M. Alexander , R. Alfarsy , C. Allende Prieto , M. Alvarez , O. Alves , A. Anand , F. Andrade-Oliveira , E. Armengaud , J. Asorey , S. Avila , A. Aviles , S. Bailey , A. Balaguera-Antolínez , O. Ballester , C. Baltay , A. Bault , J. Bautista , J. Behera , S. F. Beltran , S. BenZvi , L. Beraldo e Silva , J. R. Bermejo-Climent , A. Berti , R. Besuner , F. Beutler , D. Bianchi , C. Blake , R. Blum , A. S. Bolton , S. Brieden , A. Brodzeller , D. Brooks , Z. Brown , E. Buckley-Geer , E. Burtin , L. Cabayol-Garcia , Z. Cai , R. Canning , L. Cardiel-Sas , A. Carnero Rosell , F. J. Castander , J. L. Cervantes-Cota , S. Chabanier , E. Chaussidon , J. Chaves-Montero , S. Chen , X. Chen , C. Chuang , T. Claybaugh , S. Cole , A. P. Cooper , A. Cuceu , T. M. Davis , K. Dawson , R. de Belsunce , R. de la Cruz , A. de la Macorra , J. Della Costa , A. de Mattia , R. Demina , U. Demirbozan , J. DeRose , A. Dey , B. Dey , G. Dhungana , J. Ding , Z. Ding , P. Doel , R. Doshi , K. Douglass , A. Edge , S. Eftekharzadeh , D. J. Eisenstein , A. Elliott , S. Escoffier , P. Fagrelius , X. Fan , K. Fanning , V. A. Fawcett , S. Ferraro , J. Ereza , B. Flaugher , A. Font-Ribera , D. Forero-Sánchez , J. E. Forero-Romero , C. S. Frenk , B. T. Gänsicke , L. Á. García , J. García-Bellido , C. Garcia-Quintero , L. H. Garrison , H. Gil-Marín , J. Golden-Marx , S. Gontcho A Gontcho , A. X. Gonzalez-Morales , V. Gonzalez-Perez , C. Gordon , O. Graur , D. Green , D. Gruen , J. Guy , B. Hadzhiyska , C. Hahn , J. J. Han , M. M. S Hanif , H. K. Herrera-Alcantar , K. Honscheid , J. Hou , C. Howlett , D. Huterer , V. Iršič , M. Ishak , A. Jacques , A. Jana , L. Jiang , J. Jimenez , Y. P. Jing , S. Joudaki , E. Jullo , S. Juneau , N. Kizhuprakkat , N. G. Karaçaylı , T. Karim , R. Kehoe , S. Kent , A. Khederlarian , S. Kim , D. Kirkby , T. Kisner , F. Kitaura , J. Kneib , S. E. Koposov , A. Kovács , A. Kremin , A. Krolewski , B. L'Huillier , O. Lahav , A. Lambert , C. Lamman , T. -W. Lan , M. Landriau , D. Lang , J. U. Lange , J. Lasker , A. Leauthaud , L. Le Guillou , M. E. Levi , T. S. Li , E. Linder , A. Lyons , C. Magneville , M. Manera , C. J. Manser , D. Margala , P. Martini , P. McDonald , G. E. Medina , L. Medina-Varela , A. Meisner , J. Mena-Fernández , J. Meneses-Rizo , M. Mezcua , R. Miquel , P. Montero-Camacho , J. Moon , S. Moore , J. Moustakas , E. Mueller , J. Mundet , A. Muñoz-Gutiérrez , A. D. Myers , S. Nadathur , L. Napolitano , R. Neveux , J. A. Newman , J. Nie , R. Nikutta , G. Niz , P. Norberg , H. E. Noriega , E. Paillas , N. Palanque-Delabrouille , A. Palmese , P. Zhiwei , D. Parkinson , S. Penmetsa , W. J. Percival , A. Pérez-Fernández , I. Pérez-Ràfols , M. Pieri , C. Poppett , A. Porredon , S. Pothier , F. Prada , R. Pucha , A. Raichoor , C. Ramírez-Pérez , S. Ramirez-Solano , M. Rashkovetskyi , C. Ravoux , A. Rocher , C. Rockosi , A. J. Ross , G. Rossi , R. Ruggeri , V. Ruhlmann-Kleider , C. G. Sabiu , K. Said , A. Saintonge , L. Samushia , E. Sanchez , C. Saulder , E. Schaan , E. F. Schlafly , D. Schlegel , D. Scholte , M. Schubnell , H. Seo , A. Shafieloo , R. Sharples , W. Sheu , J. Silber , F. Sinigaglia , M. Siudek , Z. Slepian , A. Smith , M. T. Soumagnac , D. Sprayberry , L. Stephey , J. Suárez-Pérez , Z. Sun , T. Tan , G. Tarlé , R. Tojeiro , L. A. Ureña-López , R. Vaisakh , D. Valcin , F. Valdes , M. Valluri , M. Vargas-Magaña , A. Variu , L. Verde , M. Walther , B. Wang , M. S. Wang , B. A. Weaver , N. Weaverdyck , R. H. Wechsler , M. White , Y. Xie , J. Yang , C. Yèche , J. Yu , S. Yuan , H. Zhang , Z. Zhang , C. Zhao , Z. Zheng , R. Zhou , Z. Zhou , H. Zou , S. Zou , Y. Zu

Random Forests as a viable method to select and discover high redshift quasars

We present a method of selecting quasars up to redshift $\approx$ 6 with random forests, a supervised machine learning method, applied to Pan-STARRS1 and WISE data. We find that, thanks to the increasing set of known quasars we can assemble…

Astrophysics of Galaxies · Physics 2021-08-04 Lukas Wenzl , Jan-Torge Schindler , Xiaohui Fan , Irham Taufik Andika , Eduardo Banados , Roberto Decarli , Knud Jahnke , Chiara Mazzucchelli , Masafusa Onoue , Bram P. Venemans , Fabian Walter , Jinyi Yang

Radio-Selected Quasars in the Sloan Digital Sky Survey

We have conducted a pilot survey for z>3.5 quasars by combining the FIRST radio survey with the SDSS. While SDSS already targets FIRST sources for spectroscopy as quasar candidates, our survey includes fainter quasars and greatly improves…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Ian D. McGreer , David J. Helfand , Richard L. White

Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample

The DESI survey will observe more than 8 million candidate luminous red galaxies (LRGs) in the redshift range $0.3<z<1.0$. Here we present a preliminary version of the DESI LRG target selection developed using Legacy Surveys Data Release 8…

Cosmology and Nongalactic Astrophysics · Physics 2020-10-23 Rongpu Zhou , Jeffrey A. Newman , Kyle S. Dawson , Daniel J. Eisenstein , David D. Brooks , Arjun Dey , Biprateep Dey , Yutong Duan , Sarah Eftekharzadeh , Enrique Gaztañaga , Robert Kehoe , Martin Landriau , Michael E. Levi , Timothy C. Licquia , Aaron M. Meisner , John Moustakas , Adam D. Myers , Nathalie Palanque-Delabrouille , Claire Poppett , Francisco Prada , Anand Raichoor , David J. Schlegel , Michael Schubnell , Ryan Staten , Gregory Tarlé , Christophe Yèche

Simulating Wide-Field Quasar Surveys from the Optical to Near-Infrared

A number of deep, wide-field, near-infrared surveys employing new infrared cameras on 4m-class telescopes are about to commence. These surveys have the potential to determine the fraction of luminous dust-obscured quasars that may have…

Astrophysics · Physics 2009-11-11 Natasha Maddox , Paul C. Hewett

Impact of Systematic Redshift Errors on the Cross-correlation of the Lyman-$\alpha$ Forest with Quasars at Small Scales Using DESI Early Data

The Dark Energy Spectroscopic Instrument (DESI) will measure millions of quasar spectra by the end of its 5 year survey. Quasar redshift errors impact the shape of the Lyman-$\alpha$ forest correlation functions, which can affect…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-31 Abby Bault , David Kirkby , Julien Guy , Allyson Brodzeller , J. Aguilar , S. Ahlen , S. Bailey , D. Brooks , L. Cabayol-Garcia , J. Chaves-Montero , T. Claybaugh , A. Cuceu , K. Dawson , R. de la Cruz , A. de la Macorra , A. Dey , P. Doel , S. Filbert , A. Font-Ribera , J. E. Forero-Romero , E. Gaztañaga , S. Gontcho A Gontcho , C. Gordon , H. K. Herrera-Alcantar , K. Honscheid , V. Iršič , N. G. Karaçaylı , R. Kehoe , T. Kisner , A. Kremin , A. Lambert , M. Landriau , L. Le Guillou , M. E. Levi , M. Manera , P. Martini , A. Meisner , R. Miquel , P. Montero-Camacho , J. Moustakas , A. Muñoz-Gutiérrez , J. Nie , G. Niz , N. Palanque-Delabrouille , W. J. Percival , C. Poppett , F. Prada , I. Pérez-Ràfols , C. Ramírez-Pérez , C. Ravoux , M. Rezaie , G. Rossi , E. Sanchez , E. F. Schlafly , D. Schlegel , M. Schubnell , J. Silber , T. Tan , G. Tarlé , M. Walther , B. A. Weaver , Z. Zhou

The Power of DESI for Photometric Redshift Calibration: A Case Study with KiDS-1000

Accurate redshift estimates are a critical requirement for weak lensing surveys and one of the main uncertainties in constraints on dark energy and large-scale cosmic structure. In this paper, we study the potential to calibrate photometric…

Cosmology and Nongalactic Astrophysics · Physics 2025-12-23 Diana Blanco , Alexie Leauthaud , Johannes Ulf Lange , Angus H. Wright , Hendrik Hildebrandt , Sven Heydenreich , Darshika Ravulapalli , Joshua Ratajczak , Kyle S. Dawson , Jamie McCullough , Biprateep Dey , Jessica N. Aguilar , Steven Ahlen , Abhijeet Anand , Davide Bianchi , Chris Blake , David Brooks , Francisco J. Castander , Todd Claybaugh , Andrei Cuceu , Axel de la Macorra , John Della Costa , Arjun Dey , Ann Elliott , Ni Putu Audita Placida Emas , Simone Ferraro , Andreu Font-Ribera , Jaime E. Forero-Romero , Cristhian Garcia-Quintero , Enrique Gaztañaga , Satya Gontcho A Gontcho , Gaston Gutierrez , Dragan Huterer , Mustapha Ishak , Jorge Jimenez , Shahab Joudaki , Dick Joyce , Stephanie Juneau , David Kirkby , Anthony Kremin , Alex Krolewski , Claire Lamman , Martin Landriau , Laurent Le Guillou , Marc Manera , Aaron Meisner , Ramon Miquel , John Moustakas , Seshadri Nadathur , Jeffrey A. Newman , Will Percival , Anna Porredon , Francisco Prada , Ignasi Pérez-Ràfols , Amy Robertson , Graziano Rossi , Eusebio Sanchez , Christoph Saulder , Agne Semenaite , David Schlegel , Hee-Jong Seo , Joseph H. Silber , David Sprayberry , Gregory Tarlé , Benjamin A. Weaver , Rongpu Zhou , Hu Zou

The Dark Energy Spectroscopic Instrument: One-dimensional power spectrum from first Lyman-$\alpha$ forest samples with Fast Fourier Transform

We present the one-dimensional Lyman-$\alpha$ forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises $26,330$ quasar spectra, at redshift $z > 2.1$,…

Cosmology and Nongalactic Astrophysics · Physics 2025-03-27 Corentin Ravoux , Marie Lynn Abdul-Karim , Eric Armengaud , Michael Walther , Naim Göksel Karaçaylı , Paul Martini , Julien Guy , Jessica Nicole Aguilar , Steven Ahlen , Stephen Bailey , Julian Bautista , Sergio Felipe Beltran , David Brooks , Laura Cabayol-Garcia , Solène Chabanier , Edmond Chaussidon , Jonás Chaves-Montero , Kyle Dawson , Rodrigo de la Cruz , Axel de la Macorra , Peter Doel , Kevin Fanning , Andreu Font-Ribera , Jaime Forero-Romero , Satya Gontcho A Gontcho , Alma Gonzalez-Morales , Calum Gordon , Hiram Herrera-Alcantar , Klaus Honscheid , Vid Iršič , Mustapha Ishak , Robert Kehoe , Theodore Kisner , Anthony Kremin , Martin Landriau , Laurent Le Guillou , Michael Levi , Zarija Lukić , Christophe Magneville , Aaron Meisner , Ramon Miquel , John Moustakas , Eva-Maria Mueller , Andrea Muñoz-Gutiérrez , Lucas Napolitano , Jundan Nie , Gustavo Niz , Nathalie Palanque-Delabrouille , Will Percival , Ignasi Pérez-Ràfols , Matthew Pieri , Claire Poppett , Francisco Prada , César Ramírez Pérez , Graziano Rossi , Eusebio Sanchez , David Schlegel , Michael Schubnell , Hee-Jong Seo , Francesco Sinigaglia , Ting Tan , Gregory Tarlé , Ben Wang , Benjamin Weaver , Christophe Yèche , Zhimin Zhou

The DESI Early Data Release White Dwarf Catalogue

The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and…

Solar and Stellar Astrophysics · Physics 2024-03-01 Christopher J. Manser , Paula Izquierdo , Boris T. Gänsicke , Andrew Swan , Detlev Koester , Akshay Robert , Siyi Xu , Keith Inight , Ben Amroota , N. P. Gentile Fusillo , Sergey E. Koposov , Bokyoung Kim , Arjun Dey , Carlos Allende Prieto , J. Aguilar , S. Ahlen , R. Blum , D. Brooks , T. Claybaugh , A. P. Cooper , K. Dawson , A. de la Macorra , P. Doel , J. E. Forero-Romero , E. Gaztañaga , S. Gontcho A Gontcho , K. Honscheid , T. Kisner , A. Kremin , A. Lambert , M. Landriau , L. Le Guillou , Michael E. Levi , T. S. Li , A. Meisner , R. Miquel , J. Moustakas , J. Nie , N. Palanque-Delabrouille , W. J. Percival , C. Poppett , F. Prada , M. Rezaie , G. Rossi , E. Sanchez , E. F. Schlafly , D. Schlegel , M. Schubnell , H. Seo , J. Silber , G. Tarlé , B. A. Weaver , Z. Zhou , H. Zou

Quasar Photometric Redshifts and Candidate Selection: A New Algorithm Based on Optical and Mid-Infrared Photometric Data

We present a new algorithm to estimate quasar photometric redshifts (photo-$z$s), by considering the asymmetries in the relative flux distributions of quasars. The relative flux models are built with multivariate Skew-t distributions in the…

Astrophysics of Galaxies · Physics 2017-12-13 Qian Yang , Xue-Bing Wu , Xiaohui Fan , Linhua Jiang , Ian McGreer , Richard Green , Jinyi Yang , Jan-Torge Schindler , Feige Wang , Wenwen Zuo , Yuming Fu